1. 1-2 Linear Measure

2. Vocabulary
Line Segment- unlike a line, a segment can be measured because it has 2 endpoints
Betweenness of points- There is always a point that lies between two other points on any line
Congruent Segments- segments that have the same measure
Constructions- methods of creating geometric figures without the benefit or measuring tools

3. Examples
1 and 11/16 inches
4 and 1/5 cm

4. Examples
Find the measure of each segment:
= 23.1 cm
= 10.4 cm

5. Practice
5 ½ cm
2 ¼ in

6. Practice
1 + 1 ¼ = 2 ¼ in
= 10.1 cm
15 – 9.7 = 5.3 mm

7. Examples K J L 6. JK = 6x , KL = 3x , JL = 27 JK + KL = JL 6x +3x = 27
7. Are the following congruent?
JK + KL = JL
6x +3x = 27
9x = 27
x = 3
Yes, because of the single tic marks on each segment

8. Practice K J L 6. JK = 2x, KL = x+2 , JL = 5x-10 JK + KL = JL
7. Are the following congruent?
JK + KL = JL
2x +x+2 = 5x-10
3x + 2= 5x – 10
12 = 2x
6 = x
No, TU is 2 ft, SW is 3 ft